On April 11, 2025, the 2nd virtual training session by GRASP Earth in the framework of the ATARRI project to the atmospheric cluster of the ERATOSTHENES Centre of Excellence team was successfully implemented. This session focused on the input data files and configuration requirements for integrating nephelometer measurements into the GRASP algorithm. Additionally, participants started learning how to create the SADATA input file, which combines data from the CIMEL sun photometer of the AERONET network and the PollyXT Polarization Raman lidar of the Cyprus atmospheric remote sensing observatory. The session contributed to building foundational knowledge in preparing multi-instrument datasets for aerosol property retrieval using GRASP.
